Amber 5500 - Page 20

Programmable
Audio
Measurement
System
Section 2
Amber model
5500
Owner’s
Manual Version
07
The maximum
output
levels
available
from the
5500
are
higher
than
typically
available from
bench
generators
by
a
factor of 2 to 4.
Damage
to a device
under test can
result under
certain con-
ditions.
Use levels
above
+10
dBm/dBV/3V
with
caution. The
output
power amplifier
is
capable
of deliver-
ing
several
Watts of
power
to
an exter-
nal load. It is
internally protected
against
overload
conditions and short
CAUTION
circuits,
nevertheless,
unnecessary
sustained
operation
at maximum
out-
put
into
low
impedance
loads should
be avoided to minimize
internal heat
dissipation.
The
generator
gives
the
same
performance
with
or without a
load;
if the device
under test is a
high
impedance
input,
it is not
necessary
to
provide
a
dummy
load termination to
the
generator.
As
in the
frequency
mode,
the
*
key
can also
be used
to set the
generator output
amplitude
to
the
currently
measured
INPUT
amplitude.
For
example,
if the 5500
is
reading
+8
dBm
from an
external
source in the Level mode
and the AMPL and
*
keys
are
pushed
in
sequence,
the
generator
would
then
be set to
+8
dBm
output.
If an
amplitude
of
0V
is entered
as the
generator amplitude,
the
output
is set to zero
and
the oscillator will be
internally
turned off
to
avoid
any possibility
of
signal
leak
through.
The
user
programmed
amplitude
can
always
be
displayed
by pushing
and
holding
the
AMPL
key.
This
displays
the current
programmed
generator output amplitude
(as
opposed
to
the measured
amplitude)
while
the
key
is
held.
2-18
F.